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max number of HSRP MAC sddresses exceeded

I had to go beyond 16 vlans on 2 X 3550-12 switches running HSRP. I'm started sharing group numbers and was ok adding 3 more HSRP vlans but when I tried to enter the 20th vlan I get a message "MAX NUMBER OF HSRP MAC addresses exceeded". I need 24 vlans using HSRP! HELP!

4 REPLIES

Re: max number of HSRP MAC sddresses exceeded

A single HSRP group address can be used only on 16 VLAN interfaces. That's the limitation of the 3550 switch. See the link below for more info. Can you create a different group (#) for the other 8 VLANs.

http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12225see/scg/swhsrp.htm

HTH

Sundar

New Member

Re: max number of HSRP MAC sddresses exceeded

Hi Sundar...My first 16 groups each had their own group number using HSRP, then for my next 3 VLANS I started sharing the group numbers, this got me past the 16 HSRP vlan limit but when I hit my 20th VLAN I received the out of HSRP mac address error. So I have groups 13 to 28 with 1 HSRP vlan assigned to each group with the exception of the last group 28 to which I assigned another 3 HSRP vlans to it. When I tried to add the 5th HSRP vlan to it I received the out of MAC address error.

Cisco Employee

Re: max number of HSRP MAC sddresses exceeded

Hi Friend,

There is also a limitation in the way you can implement the group with vlan interfaces.

Just read this link and you will be good to go

http://www.cisco.com/en/US/partner/products/hw/switches/ps646/products_qanda_item09186a00801cb707.shtml#q3

HTH

Ankur

New Member

Re: max number of HSRP MAC sddresses exceeded

Hi Ankur...Thanks for pointing me to this page, it did help me solve my problem.

Thanks Again! Ken

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